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A. O. BRUNETTE HEATER FOR SAWDUST 0R COAL DUST Filed May 11, 1925 2 Sheets-Shed 1 E Q I V In e tor 7% air a fll'ww By I Attbmey 0a. 16, 1928. 1,687,539 A. Q. BRUNETTE EATER FOR SAWDUST 0R com, nus'r Filed May 11. 1925 2 sheets-sheet 2 W147 7' 1' 21/ e j 2 Inv tor Patented (lot. 16, 1928.

barren STATES PATENT OFFICE,

ARTHUR O, BRUNETTE; OF KELOWNA, BRITISH COLUMBIA, CANADA.

HEATER EOE SAWDUST OR GOAL DUST.

Application filed May 11, 1925; Serial No 29,533.

of suchconstruction and adapted to per form effectively the above named function The principal feature of the invention resides in a grate having a raised and pointed Central portion, in conjunction with a fuel magazine adapted to discharge upon the raised portion at a regulable rate. The

raised portion of the grate has for its purpose to spread thefuel in an even thickness.

The rate of discharge from the magazine is controlled by a slidable sleeve mounted on the lower end of the magazine. The 1nvention also provides for an overdraft and an under-draft acting on opposite sides of the grate whereby the fuel is burnt with a clear combustion. Another feature of the invention is a construction within the stove which arlords proper circulation of the gases and prevents accumulation of them,

The invention is fully disclosed in the following description and in the accompanying drawings, in which:

F'gure 1 is a vertical section of the device;

Fi ure 2 is a front elevation thereof P! a Figure 3 is a section on the line 3-3 of Figure 1;

Figure 4. is a section oncthe line H of, qFigure 1; c I

Figure 5 1s a section on the hue 55 oi Figure 1;

Figure 6 is a Figure 1; and

Figure 7 is a. fragmentary vertical section section on the line 66 of taken at right angles to Figure 1.

Reference to these views will now he made by use 01": like characters which are employed to designate corresponding parts throughout. I i I v The heater or stove comprises a lower cylindrical section 1 and a slightly larger upper cylindrical section 2. The latter is provided with a removable top 3 through which the fuel may be charged.

The bottom of the lower portion 1 contains a cylindrical ash-pit 1- spaced annularly as at 5 from the wall of the section. Above the wall of the ash-pit, an inclined deflecting hood 6 is secured to the wall of the section '1. An air draft device 7 enters the space 5, while a similar member 8 passes through this space and communicates with the interior of the ash-pit.

The upper part of the ash-pit supports a circular grate 9 having a central raised por tionlO'. Althoughthis portion'is shown as conical, it may be square or otherwise polygonal, the essential feature being that its sides are sloped and convergent upwardly towards a point. This raised portion is formed with a plurality of slots 11 diverging from the centerthereof. The remainder of the grate is formed with concentric circular slots 12 which are necessarily f interrupted at intervals 13 in order to main- 7 tain the unity of the structure. 2 The bottom of the ash-pit is provided with a sliding door 1 1 through which the contents may be removed.

From the upper edge of the section 2 is suspended a shell 15 having tapered'walls and terminating in a cylindrical lower end 16 Cross arms 18 are supported in the upper part of the shell 15, and from these is suspended aitapered tubular member 19, the lower end of which is secured as at 20 to the wall of the shell. The interior of the member19, together with portion of the shell 15 communicating therewith, comprises the fuel magazine oi the stove. At the intersection of the arms 18 is provided a rotatable internally threaded boss 21. This member receives the upper threaded end of a rod 22 which extends downwardly throughout the length of the shell 15. An arm 23' is secured to the lower end of the rod and carries a sleeve 24 which is slidableon the cylindrical end 16 of the magazine.

cation between the fire box or the stove and the space 2G between the shell and the member 19. This construction provides for an adequate flow of gases through the device to ventilate the same and to prevent accumulation of gases. The upper end of the magazine is formed with similar apertures 27 through which the gases return to the body of the stove so that they may radiate their heat through the wall of the section 2 The gases are then free to leave the stove through the flue 28 communicating with the interior of the section 2. The section 1 is provided with a door 29 through which access may be had to the interior for cleaning repairing or replacing parts.

' with apertures 25 whichestablish cominuni- In the operation of the device, saw dust or coal dustis charged into the magazine by removal of the top 3. The rate of feed of the fuel upon the grate is determined by regulation of the. sleeve 24. F or example, if a slow feed is desired, the boss 21 is turned to bring the sleeve relatively close to the grate. F or larger feeds, the sleeve is raised accordingly. The tapered nature of the cen-;

tral part 10 of the grate causes the fuel to spread evenly over the surface of the grate.

llie fresh air entering the space 5 through the damper 7 rises towardsthe hood 6 and is deflected thereby upon the fuel, whereby to be understood that various alterations in the details of construction may be made without departing from the spirit of the in ventionfas indicated by the appended 'claims.

Having thus fully described the invention, what I claim as new, and desire to protect by Letters Patent is i i 1. A heater of the character described, comprising a body, a grate contained within said body, said grate having a raised central portion converging upwardly towards a point, said raisedand remaining portion of the grate being formed with slots, a fuel magazine having its discharge end disposed over said raised portioin. an. internally threaded boss supported in the upper part of said magazine, a rod having one end "threaded into said boss, said rod extending downwardly through the magazine, a sleeve supported by sa d rod and shdable on the discharge end of said magazine, an ash-pit surrounding saidgrate and spaced from said body, a damper communicating with the space between the ash-pit'and the body, a deflecting hood supported over said space and above the grate, and a second damper leading to the interior of said ash-pit.

2. A heater, comprising a casing, a grate suoaorted within said casin a casin suspended from. the topof the aforesaid casing and converging toward the lower end, a

hopper rigidly supported within the latter casing and spaced from the upper walls thereof, said hopper having its upper end open and communicating directly with the upper end of said inner casing, said inner casing having openings leading from the upper end into the nterior of'the outer casing and openings therethrougli connecting the interior offsai'd outer casing with the interior of the inner casing at :a point adjacent the bottom of said hopper.

3. A heater comprising a casing, a gratev supported within said casing, a shell supported from the top of the aforesaid casing within the same and having aconvergent lowereiid, a tapered tubular member extending upwardly from the convergent lower portion of the shell forming a hopper spaced fronithe upper part of said shell, openings arran ed in the conver ent aart of the shell (3 C7 at the outwardside of the hopper, openings at the .top of the shell communicatingwith the interior of the main casing, and a flue leading from the main casing above the con- 7 vergent lower end of the hopper. I

l A; heater comprising a casing, a cylindrical wall arranged. in the bottom of said casing and spaced from the. inner wall thereof, a grate arranged within said cyj lindricalw'all above the bottoniof the casing, regulated means for'directing a air into the space/beneath said supply of grate .enclosed by the cylindrical Wall, regulated means for directing air into the tween the casing and the 'cylindricalwall,

an upwardly inclined flange extending inwardl Y from tliewall of the casin and roj ecting over the top of the cylindrical inner wall inspaced relation. to the upper end thereof and forming an annular baffle directing air from the annular space between said wall and the casing laterally inward and upwardly over the fire.

In witness whereof I have hereunto set my hand.

ARTHUR O. BRUNETTE.

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